Diagnosis; Diagnosis Table - Suzuki Jimny Service Manual

3D-8 FRONT SUSPENSION

Diagnosis Table

For description not found in the table below, refer to "Diagnosis Table" in Section 3.
4WD CONTROL SYSTEM
Condition
4WD Indicator light
flashing
2WD/4WD switching
error
4WD CONTROL SYSTEM DIAGNOSTIC FLOW TABLE
Before performing the trouble diagnosis, check that the air locking hub assemblies are in good condition and
there is no air leakage from vacuum hoses and vacuum pipe. Refer to "4WD Control System Check" in this sec-
tion for air leakage.
[NOTES ON SYSTEM CIRCUIT INSPECTION]
• Be sure to read "Precautions for Electrical Circuit Service" in Section 0A before circuit inspection and
observe what is written there.
• For system circuit, refer to the figure of "System Circuit" in this section.
Step
1 Check ground circuit.
1) Disconnect coupler from 4WD controller
with ignition switch OFF.
2) Check for proper connection to 4WD con-
troller at all terminals.
3) If OK, check continuity between A5 terminal
and body ground.
Is there continuity between A5 terminal and
body ground?
2 Check power circuit.
1) Disconnect coupler from 4WD controller.
2) Turn ignition switch ON.
3) Check voltage between A10 terminal and
ground.
Is it 10 – 14 V?

Diagnosis

Possible Cause
• Hub locking procedure error
• Defective VSV2
• Defective vacuum switch
• Defective check valve or vacuum tank
• Air leak from vacuum circuit
• Clogged vacuum hose or pipe
• Faulty 4WD controller
• Defective air locking hub assembly
• Abnormality in 4WD control system
• Air leakage from vacuum circuit
• Clogged vacuum hose or pipe
• Defective check valve or vacuum tank
Action
Shift transfer shift control lever
2WD → 4WD once again
Replace
Replace
Replace
Check and repair
Replace
Check and replace
Replace
Inspect referring to "4WD Control
System Diagnostic Flow Table"
Check and replace
Replace
Replace
Yes
Go to Step 2.
Go to Step 3.
Correction
No
"B" wire is open.
"Y/R" circuit is open or
short.